package cn.wolfcode.wolf2w.service.impl;

import cn.wolfcode.wolf2w.domain.Strategy;
import cn.wolfcode.wolf2w.domain.StrategyCatalog;
import cn.wolfcode.wolf2w.query.StrategyCatalogQuery;
import cn.wolfcode.wolf2w.repository.StrategyCatalogRepository;
import cn.wolfcode.wolf2w.service.IDestinationService;
import cn.wolfcode.wolf2w.service.IStrategyCatalogService;
import cn.wolfcode.wolf2w.service.IStrategyService;
import cn.wolfcode.wolf2w.util.DBHelper;
import cn.wolfcode.wolf2w.vo.CatalogVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.aggregation.Aggregation;
import org.springframework.data.mongodb.core.aggregation.AggregationResults;
import org.springframework.data.mongodb.core.aggregation.TypedAggregation;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class StrategyCatalogServiceImpl implements IStrategyCatalogService {

    @Autowired
    private StrategyCatalogRepository repository;
    @Autowired
    private MongoTemplate template;
    @Autowired
    private IDestinationService destinationService;
    @Autowired
    private IStrategyService strategyService;

    @Override
    public void save(StrategyCatalog strategyCatalog) {
        repository.save(strategyCatalog);
    }

    @Override
    public void update(StrategyCatalog strategyCatalog) {
        repository.save(strategyCatalog);
    }

    @Override
    public void delete(String id) {
        repository.deleteById(id);
    }

    @Override
    public StrategyCatalog get(String id) {
        return repository.findById(id).orElse(null);
    }

    @Override
    public List<StrategyCatalog> list() {
        return repository.findAll();
    }

    @Override
    public Page<StrategyCatalog> query(StrategyCatalogQuery qo) {
        Query query = new Query();

        //当前页显示数据
        Pageable pageable = PageRequest.of(qo.getCurrentPage()-1,qo.getPageSize()
                , Sort.Direction.ASC,"_id");

        return DBHelper.query(query,template,StrategyCatalog.class,pageable,qo);
    }

    @Override
    public void saveOrUpdate(StrategyCatalog strategyCatalog) {
        //查询到destId对应的destName
        String destName = destinationService.get(strategyCatalog.getDestId()).getName();
        //将destName设置到StrategyCatalog对象中
        strategyCatalog.setDestName(destName);
        if (StringUtils.hasLength(strategyCatalog.getId())){
            this.update(strategyCatalog);

        }else {
            this.save(strategyCatalog);
        }
        /*Query query = new Query();
        query.addCriteria(Criteria.where("destId").is(strategyCatalog.getDestId()));
        Update update = new Update();
        update.set("destName",destinationService.get(strategyCatalog.getDestId()).getName());
        template.updateMulti(query,update,StrategyCatalog.class);*/

    }

    @Override
    public List<CatalogVO> queryStrategyCatalogGroupByDestName() {
        List<CatalogVO> catalogVoList = new ArrayList<>();

        //聚合查询
        TypedAggregation<StrategyCatalog> agg = Aggregation.newAggregation(StrategyCatalog.class,
        Aggregation.group("destName")
                .push("name").as("names")
                .push("id").as("ids")
        );
        AggregationResults<Map> result = template.aggregate(agg,Map.class);
        List<Map> datas = result.getMappedResults(); //将结果转化成list<map> map描述一行数据
        for (Map data : datas) {
            CatalogVO vo = new CatalogVO();

            vo.setDestName(data.get("_id").toString());  //id
            List<Object> names = (List<Object>) data.get("names");  //攻略分类的名称集合
            List<Object> ids = (List<Object>) data.get("ids");  //攻略分类的ids集合

            List<StrategyCatalog> catalogList = new ArrayList<>(); //攻略分类对象

            for(int i = 0;i < names.size(); i++){
                StrategyCatalog sc = new StrategyCatalog();
                String name = names.get(i).toString();
                String id = ids.get(i).toString();
                sc.setId(id);
                sc.setName(name);
                catalogList.add(sc);
            }
            vo.setMapList(catalogList);
            catalogVoList.add(vo);
        }
        return catalogVoList;
    }

    @Override
    public List<StrategyCatalog> queryCatalogByDestId(String destId) {

        //查目的地下的攻略分类集合
        List<StrategyCatalog> catalogs = repository.findByDestId(destId);

        for (StrategyCatalog catalog : catalogs){
            //遍历每个攻略分类,查询每个攻略分类的攻略集合
            List<Strategy> strategies = strategyService.queryByCatalogId(catalog.getId());
            catalog.setStrategies(strategies);
        }

        return catalogs;
    }
}
